I looked at Bailey & Stewart in 2009 for 2 x 18 tonne grain trailers. We went for Baileys in the end, mostly due to them having the sharpest pencils i.e. the cheapest. Being 8 miles from their old factory at Aunsby helped, I'm sure.
The Stewart seemed to be much better thought out but they wouldn't budge on price whereas Bailey did. I chose 650mm Nokian Country King tyres, full width front wndow, air & hydraulic brakes, along with a second set of lights on the tail board & full suspension.
Bailey have recently bought & equipped a new factory at Sleaford, so they have to churn out trailers pretty quickly to recover their considerable investment.
Hope that helps.